Across
- 2. neuron - nerve cell that carries impulses from an organ or receptor to the CNS
- 3. - fiber carrying impulses away from the cell body of a neuron
- 4. neuron - neuron “upstream” of the synapse
- 6. - connection between the end of a nerve cell and another cell. A tiny gap traversed by neurotransmitters.
- 8. potential - difference in electrical potential across a nerve cell membrane at rest ~ -70 mV
- 9. cells - cells that form the myelin sheath
- 10. - cell within the nervous systems that carries electrical impulses
- 13. - a cell specialized to respond to the stimulation of an action potential
- 14. neuron - neuron “downstream” of the synapse
- 16. nervous system (PNS) - nerves that convert sensory information to the CNS and impulses to muscles and glands
- 18. - fine fibrous structure on a neuron that receives impulses
- 19. polarization - when a lipid membrane has a positive potential on one side and a negative potential on the other side
- 20. - a neurotransmitter that functions in both the CNS and PNS
Down
- 1. - chemical released across the synaptic cleft that transmits the action potential
- 3. potential - reversing the membrane potential from -70 mV to +40 mV
- 5. potential - difference in potential across a neuron membrane
- 7. nervous system (CNS) - brain and spinal cord of vertebrates
- 11. of Ravier - gap in myelin sheath
- 12. neuron - relays electrical impulses from a sensory neuron to a motor neuron (in the CNS)
- 15. - nerve bundle of many nerve fibers which connect the CNS with parts of the body
- 17. neuron - nerve cell that carries impulses away from the CNS
- 18. - fiber that carries impulses towards the cell body of a neuron
- 19. sheath - insulating sheath around axons